Shoe



A. G.` SHAVER.

H E. APPLICATION FILED APH25Sy13Q RENEWED DC. 6,1920- 1,383,865,Patented July 5, 1921.

` A ck m s si Q N N w n k' N Q ,1 'O Q T o @ZZV/w hom concern veffective manner.

UNITED STATES y PATENT@Fece ARCHIBALD e. sHAvEn, or Carcano, ILLINQI'SQ,ASSfIGNoRjTo 'cAsALEsAr'ir Dnvrcn comrmxonivnwyonx; N1 Yi, e.;consonancia or "NEW kYouri.

' suon` Beit known that I, ARQHIBALD GrifSinvn-R, a citizen of theUnited States, residing at .Chicago, inthe county of Cook and- State ofIllinois, have invented certain new and useful Improvements in Shoes, ofwhich the I following is a speciiication, reference being had therein tothe accompanying drawing` This .invention relates to improvements inaramp engaging shoe, especially designed for use in conjunction with thevehicle carried circuits as set forth in mytwo'co-pending applications,filed even',datelherewlth,.

Serial Nos. 292,545 and 292,548.

In designing a shoe it is desirable to so Y construct it that thedesired pressure isexerted thereon" to hold it downwardly so that whenyieldingly engaging the ramp atany speed, the electrical Acontactscontrolledthereby will be operated ina positiveand 'A further object ofthis invention is :the

brake system and held downwardly ,and so housed and-constructedthatshould anysof the shoe be broken off the air brake system will be ventedto producela stop, condition.

A still further object of this invention is the provision of a shoe sohoused aste be protected from the, elements and so constructed as to bereadily attached to any'part of theolocomotive or motor vehicle desired,

Vthe same `being providedwith a removable rampgengaglng portion thisworn art may be removed at will without necessitating thehchanging ofthe other mechanism;

A still further object of this invention is 'the provision of a shoeheld down by pneumatic force and which in. its lowermost position holdsthe circuits closed but which when moved to its highermost position andis jammed, will produce a danger condition, opening the circuit to setthe brakes.

In the accompanying drawings:

Figure 1 is a view in elevation of the complete shoe.

Fig. 2 is a similar view thereof with the front casing removed and partsof the mechanism shown in section.

Fig. 3 is a section taken on line 3 34 of eferring to the drawings, thenumeral 5 designates the casing of the present shoe, which is providedwith a removable cover 6 for closing the vchamber 7 Mounted `in the-chamber? visa fixed hollow member 8, the 1upper' end 'of which-.is` incommunication through'a pipe 9 withthe air brake system.` In the lowerend of the member 8 is .astuiing box- .510 so that the hollow,plunger-L11 connected by the threaded engagingand ,.locln'ng-nut'12jtothe vertical andV movable shanklof the verticalV slidable shoe 14' ,may.be-properly,connected Sand normally held .downwardly bynair pressurefrom.. the system;.-kv iff.: '1. 1 The shoulder -15 vlimits the`downward brake systcmffull length so that theibreak- Aageoftheshoe atanyfpoint will ventathe vrsystem andthusbringgthe, train to a;halt,sothe-.reason may-.be ascertained. The lower 4 end` ofthe shoe l isprovided with a socket 17 fors-the removable fasteningof the wear y Yreceiving plate or :member :18, ,which ,is held provision of a shoelconnec'tedlto v,the air.

inv placeby means of the bolts 19. By this meansthe desired. v f. r :1`Detachably connectedto the tubular. member 11, within the chamber 7, isclamp 'bracket- 20. lwhich .carries-the removable f Petentedfuly 5 1921Application filed April 25, 1919, serjivaino. 292,546.- n'eneweaDecember 6,. 1'92o.'1seria1m. 428,771.-

i movementof theshoe'while the chamber loiv thereof 1sI in communicationwithv the air plate '-18 may berenewed when knifey contacts ;21-and22for engagement with thevariouspairs ofcontactsA 23 and 24` and ;V the joppositely disposed contacts v'25 and 26,fsuch contacts as shown inFig.- 2 ,belng arranged sofas vto bek supported vupon the blocks27and-28; of insulatiommount- I ed in thehamber? The number oflYcontactsSarehere shown 4merely to :indicate how the present shoe .may

be connected yforcontrolling'thecircuits,-but i j any number ofAcontacts 'may 4be employed as may be found desirable.

What I claim as new is:

1. shoe for electrical train control systems, lncluding a support, astationary plunger casing carried lthereby and adapted tov receive airfrom an air brake system, a vertical slidable hollow plunger having theupper end mounted therein, a ramp engaging member carried upon the lowerend.' thereof, said member being provided with an air chamber throughoutthe length thereof, the plunger and ramp engaging member being helddownwardly yieldingly by 'the air pressure and so that any breakage ofthe ramp engaging member will cause a leakage of the air from'the airbrake system, and

electrical contacts carried by the slidable memberintermediate `of theends thereof.A

2. 'A shoe for electrical ltrain control'sy's'- tems,including"asupportha'ving a chamber" therein, a cylinder having one end for theconnection with the air brake system mounted within the chamber', ahollow member sealed atits lower' end'and having its upper 1y 'end in`communication with and sli'da' mounted in said cylinder, the same beingadapted to 'be yieldingly vheld downwardly by air pressure and theVlower end ofthel latter -being exterior lof .thev support and adaptedtoengage aramp, and cooperative circuit controlling means mo'linted in thevchamber' and :connected to the hollow member.

3. shoe mechan1sm,'mc1uding ya support having al chamber-open atone-side andhavingan opening through the lower'end, a

cover forthe vchzunberya cylinder 'having a Ystuffing `box at one endand meanslat ythe other end for receiving air from'vanairibrake systemmounted in the chamber, atubular piston slidable in the cylinderandmounted within thefchamber, a ramp engagingmember havinga chamberextending from one end and terminating withinthe lowerend,

the upper end beingconnectedltofthe'lower `end of the tubular member andmovable therewith, saidramp engaging' member being mounted for slidingmovement inthe l opening of the support and held downwardly by -airIpressure, and means carried by the upper end thereof for limitingthedownward movement of the ramp: engaging member. Y

4. A shoe mechanism includingla support, an air supplied chamber carriedthereby, -a tubular plungermounted in said chamber "for verticalmovement',said plunger `being -sealed at its lower end, and carryinglthe shoe, 'aV fixed` electrical contaetcarried by 'the tubular member,and -loppositelydisposed electrical contacts carriedbyfthesupport forVcoperating with the `movable contact member, said Contactmembersbemginelectrical lenga-gement when -the'shoe is in its-vlowermost positionand beingA outof engag'ement should the shoe be held.in uppermostor abnormal position.

A5. Apshoe Vof `the character-.described ino cludingamain"Casing'hfwingy ahollow abutment leading 'from'the' 'lowerl endthereof,

a plunger casing mounted within the main casing adjacentthe upperportion thereof andlinalinement with the hollowabutment, a'tubularplunger mounted within'the' plun- 'ger casing for sliding linovementga:ramp

engaging member connected to the lower end and carried by the plungerand provided `witli a sealed chamber'therei'nincommunication withftheplunger, the air pressure being disposed to hold-therampengagedmemlb'e'rand the plunger in downwardposition,

'and coperative circuit making means "carvried by-the plunger `andmounted within'the main casing,the 'circuit making meansfbeing inoperable relation 'when theiramp'fengaging'member is helddownwardly'andfbei'n'g disconnected when'fthe 'ramp' engagingmem--'ber-isin" its` uppermost position andjammed.

6. -A shoe lfor electrical `train 1 control Ysystems includinga'boxinghavin-g Aa rampenmounted for lsliding 'movement in f the latter andhaving a chamber I leading .fromthe upper 'end and; terminating acenttheflower f-end thereof, plungerbasingfmounte'd in the boxing adjacentthe upper end thereof,

a tubular plungerffor'tliis member' 4slidably fmounted yin the casing"and its lower'lend detachably-connected to the upper end of plurality'ofil contacts 'mountedin'f the 'boxing `4and disposed to be f engagedkby' the Contact member ofthe' arm, saidi latter contactmember being out'of engagement-'therewith when 'theplunger is'` in- 'eX-tremeupper-position l In testimony whereof I aflixv my signature.

ARCHIBALD gaging member guidingiportionfnthe lower end thereof, lla-ramp engaging member

